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Finding the Fourth Proportional to 6,961.92, 9,607.68 and 3,818.40

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Solution

The fourth proportional to 6,961.92, 9,607.68 and 3,818.40 is: 5,269.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,961.92 : 9,607.68 = 3,818.40 : x
  2. Step 2: Convert to fraction form
    6,961.92/9,607.68 = 3,818.40/x
  3. Step 3: Cross multiply
    6,961.92x = 9,607.68 × 3,818.40
  4. Step 4: Simplify right side
    6,961.92x = 36,685,965.31
  5. Step 5: Solve for x
    x = 36,685,965.31/6,961.92
  6. Step 6: Final answer
    x = 5,269.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.